Rotary cross cut tool



Feb. 12, 1935.' R, s. BROWN 1,990,724

ROTARY CROSS CUT TOIOL 2 Sheets-Sheet 2' Qm. N

Filed Oct. 3l, 1950 Elx.,

A BY MM* Patented Feb. 12, 1935 y ROTARY CROSS CUT TOOLV Robert S.Brown, New Britain, Conn., assignor to The New Britain-Gridley Machine Company,

New Britain, Conn., necticut Application October 31,

15 Claims.

My invention relatesto a cross cut tool for use with machine tools.

The machine tools with which my invention is intended to be used embrace allV types in which a tool and spindle are relatively rotated. My

invention is very effective when used on aV multiple spindle automatic chucking machine having an indexing turret. In the drawings-'I have il-` lustrated my invention as applied to a machine tool in which the spindle is given an axial feed, but the. invention is equally useful with a machine in which the work is fed axially.

Itis the principal object of the present invention to provide improved means for necking, vun- 5 i dercutting, and recessing. Further objects are to provide improved pilot means for initiating the radial motion of the cutter, and to provide a tool which will be rigidly secured and capable of exact adjustment. Other objects and features of the invention will be pointed out or will become apparent upon a reading of the specilication. Briefly stated, in a preferred form I employ a rotary cross feeding cutter head in .which the cross feed of the cutter is eiected'by the relative 25 rotation of two interengaging parts which is produced whenV one of these parts is moved axially relatively to the other. The axial feed of either the work or the -spindle carrying the cutter, together with means for holding the other of Ythese parts against axial motion, arerutilized to produce relative axial motion of thetwo interengagingy parts. Spring means may also Vbe provided which will automatically move the cutter radially to its inoperative position when thecutter and the work are axially separated at the completion of a cross cut.

, In the drawings which show, for illustrative rpurposes only, a preferred form of the inventioni Fig. `1V is a central sectional view-of aY rotary cross'cut tool embodying features of my invention, parts being shown in elevation;

Fig. 2 is an enlarged sectional .view of the principal parts of the tool, taken upon the plane of the line 2-7-2 in Fig. 3;

Fig. 3 is an end view .of the front end of the tool; Fig. 4.- is a central sectional view taken upon the p lane of the line 4--4 in Fig. 2, parts being shown 50 v in plan, and-parts being shown in diierent 0perative position from that shown in Fig-2;

Fig. 5 is a transverse section takenuponrthe plane of the line 5--5 in Fig. 2; YFigli isa partial centralV sectional View of a mcdication; Y

a corporation of Con- 1930, serial No.V 4.9.2,393v

Fig'. '7 isa central sectional View of a modied form of the rear end of thetool.

Insaid illustrative drawings, represents a spindle of a machine toolof thetool rotating type, such as an automatic chucking machine. 11 is agear connected to the spindle to impart rotation to the spindle. The spindle is moved axially Vby means of a collar 12 which is interposed between the gear 11 and `a nut 12EL which is threaded to the spindle 10. The collar 1,2 is operated by cam means which are not shown in the drawings. 13 is a cross cut head which is preferably made in two parts which are bolted together in any convenient manner. In the form shown in the drawings, this head is so arranged w'ithrespect to the spindle vl0 that the head can move axially relatively to the spindle, but cannot rotate with respect thereto. This effect is obtained by providing the spindle with keys 14 whichvcooperate with longitudinal keyways l5 in the head 13. '16 is a slide mounted on transverse guides in the head 13 so as to be radially movable relative to the axis of the spindle' 10 by meanswhich'will presently be described. 17 is a slide-gib which is adjustable by means of screws 18. Mounted on the slide 16 isa cutter 19 lhaving a shank 20. The cutter rotates ywith the spindle .10 about theaxis of the. spindle .and is moved radially to the spindle by means of the slide V16. and which is held in a suitable chuck or holding vdevice 22'. Y

In order to move the slide 16 and. theV cutter 19V radiallyrelative to the axis of the spindle 10, I provider two relatively rotatable interengaging parts', one oi which is connected to the spindle 10 andthe other oi which is connected to the head Y13. In a preierred form of my invention shown-.in the drawings these interengaging parts are screw threaded. The connection between one of these parts andthe part to whichit is connected is a rigidconnection; the"c0nnection between the other and the part to which it is connected is such as to permit relative rotation but Ynot relative axial movement. In the form shownV in the drawings, a nut 23 is rigidly connected to the spindle 10, and an operating screw 24 is connected to the head 13. The screw 24 can rotate relatively to the head 13, but is held against axial movement relative thereto by means of a thrust washer 25. This thrust washer iits into a circumferential Ygroove in the screw 24 and is rigidly Yattached to .the head 13 in anyfsuitable manner as by screws.y The washer is preferably made'in .one piecerand .then broken apart in oreArsNr ortica:

21 is a work piece which is not rotated the front of the spindle 10 Ywhen the means shown in Fig. 7 are employed. l' f j i While the invention has been described in considerable detail and a speciic Vform has been shown inthe drawings, it is to be understoodthat the construction may be otherwise embodied and employed in connectionwith cross cut` tools Vof various types other than that herein shown.

f 1. A cross cut tool for machine tools comprising, ahead, a spindle, said lspindle and said head being held against Vrelative rotation,

members, and means whereby relative movement of said threaded members will move saidcutter radially of said head. Y,

2. A cross cut tool for machine tools comprising, a head, a pair of interengaging screw threaded members, said head being rotatable relative to one of said threaded vmembers and being non-rotatable relative to the other of-said threaded members, means for causing relative rotation of said threaded members, a pinion rotatable by one of said threaded members, a slide in saidhead movable transversely to said head, av rack connected to said slide and engaged by said pinion, and a cutter mounted on said slide, ,said rack being adjustable longitudinally to said slide. i

3. A cross cut tool for machine tools comprising, a head, a cutter mounted on said head, a pair of interengaging screw threaded members, said head being rotatable relative to one of said threaded members and being non-rotatable relative to the other of said threaded members, and a spring for moving said threaded members relatively to each other, whereby when saidhead is moved axially away from a work pierce said spring will operate to move said cutter radially away from the Yaxis of rotation ofY said head.

4. A cross cut tool for machine tools comprising, a head,Y a cutter mounted on said head, a pair of interengaging screw threaded members, said head beingV rotatable relative to one of said threaded members and being-non-rotatable relative to the other of said threaded members, a spring for moving said threaded members relatively to each other, a pilot member for cooperating with a work piece and operating to hold one of said threaded members againstaxial motion, and means whereby relative motion of said threaded members will move said cutter radially of said head. v

5. A cross cut tool forv machine tools comprising, a head, a spindle, said spindle and said head beingheld against relative rotation, a nut rigidly attached to said spindle, a screw engaging with said nut and connected to said head, said screw being rotatable relative to said head but held against axial movement relative thereto, a cut-V ter mounted on said head, means for causing relative movement'of said nut and said screw, and

means .whereby axial movement of said spindle will move saidv cutter radially of said head.

l6. Across cut tool for machinetools comprising, a head, a. spindle, said spindle and said head being held against relative rotation, a nut rigidly attached to said spindle, a screw engaging with said nut and connected to said head, said screw being rotatable relative to 'said head but: held against axial movement relative thereto, Ya pinion rotatable ,with said screw, a spring interposed between said spindle and said screw, a pilot member for cooperating with a work piece and operating to hold said screw againstV axial motion, a slide, in said head movable transversely to said head, a rack connected to said slide and. engaged by said pinion, a cutter mounted on said slide, whereby the cooperation `of said pilot: member with a work piece will -operate to cause said eutter to move radially of said head.

'7. A cross out tool for machine tools comprising, ahead, av pinion rotatably mounted in said head, means to rotate said pinion relatively to said head, a slide in saidhead movable transversely to said head, a rack connected 'to said slide and engaged by said pinion, 'and a cutter mounted on said slide, said rack being adjustable longitudinally to said slide.

8. A cross cut tool for machine tools compris ing, ahead, a cutter mounted on said head, pilot means cooperating with a work piece, an antifriction bearing for supporting said pilot means, and meansl whereby the motion of said cutter relative to said head will be controlled by the cooperation of said pilot means with a work piece.

9. A cross cut tool for machine tools comprising, a rotatable head, a cutter mounted on said head, a hollowrpilot member coaxially mounted in said head for cooperating with a work piece, an anti-friction bearing interposed between said pilot member and said head, a cover plateto hold said pilot member in place in said head, and means whereby the motion of said cutter relative to said head will be controlled by the cooperation of said pilot member with a work piece.

10. A cross cut tool for machine tools comprising, a cutter, a spindle, aV bearing support, a rod having adjustable stop means for limiting the axial motion of said rod relative to said bearing support, a sleeve within said bearing support, ank anti-friction thrust `bearing between said support and said sleeve, said sleeve being rotive to the other of said threaded members, a pilot Y `member for cooperating with a work piece and operating to hold one of said threaded members against axial motion, and means whereby relasaid head and pilot means upon relative longimeans, and means for causing atransverse movement of said tool upon said relative rotative movement between said head and pilot means caused by said relative longitudinal movement.

13.y A cross cut tool comprising a head, a pilot means rotatably carried thereby and held against relative axial movement thereon, a member slidable but not rotatable on said head, means between said member` and pilot means for-causing relative rotation between said pilot means and member upon relative longitudinal movement between saidmember and pilot means, a-tool carried by said head, and means for causing transverse movement of said tool on said head upon said relative rotation of said pilot means and member..

14. A cross cut tool comprising a pair vof coaxial relatively movable members, said members having means for causing relative rotation upon' relative axial movement of said members, a tool head carrying a tool, said head being movable a tool, means for moving said tool transversely 10 upon relative axial movement of said members to cause said tool to engage a work piece, means for moving said members unitarily, and fixed abutment means carried by said machine frame, a

rearward axial extension on one of said members 15 to engage said abutment means to arrest the movement of said one of said members while permitting the movement of the other to continue so as to effect transverse movement of the tool.

ROBERT S. BROWN.

Feb. 12,1935,

E. H. cRoFooT p -r AL Filed June s; 1952 '2 sheets-sheet 1V 

